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AUSCERT External Security Bulletin Redistribution
[DLA 1650-1] rssh security update
31 January 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
CVE Names: CVE-2019-1000018
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running rssh check for an updated version of the software for their
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Package : rssh
Version : 2.3.4-4+deb8u1
CVE ID : CVE-2019-1000018
Debian Bug : 919623
The ESnet security team discovered a vulnerability in rssh, a restricted
shell that allows users to perform only scp, sftp, cvs, svnserve
(Subversion), rdist and/or rsync operations. Missing validation in the
scp support could result in the bypass of this restriction, allowing the
execution of arbitrary shell commands.
Please note that with the update applied, the "-3" option of scp can no
longer be used.
For Debian 8 "Jessie", this problem has been fixed in version
We recommend that you upgrade your rssh packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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